Subnetting an IP Address

Expert Reference Series of White Papers Subnetting an IP Address 1-800-COURSES Subnetting an IP Address Alan Thomas, CCNA, CCSI, Global Knowledge Instructor Introduction The process of Subnetting is both a mathematical process and a network design process. Mathematics drives how subnets are calculated, identified, and assigned. The network design and requirements of the organization drive how many subnets are needed and how many hosts an individual subnet needs to support. Binary basics and IPv4 Address structure were covered in part one of this two-part paper. This paper focuses on the process rules and helpful hints for learning to subnet an IPv4 Address . It covers the following topics: 1. Need for subnets 2. Process for Subnetting 3. Formulas for subnet calculation 4. Examples for putting everything together 5. Variable Length subnet Mask (VLSM) 6. Determine the subnet , usable range of host addresses, and broadcast Address for a given host.

There are several formulas and rules used to calculate subnets. The formulas and rules are discussed below. Possible Number of Subnets . To calculate the number of possible subnets, use the formula 2. n, where n equals the number of host bits borrowed. For example, if three host bits are borrowed, then n=3. 2. 3 = 8, so eight subnets are ...

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  Address, Calculate, Subnet, Ip address, Calculate subnets

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